The pointer not being NULL is enough indication that the mark is set.

Also, rename the pointer from 'mark_begin' to simply 'mark', since
the former is kind of pleonastic.

Because the highlighting hinders the display of affected lines,
and, more importantly, only the highlighted part would be written
if the file was modified and the user answers yes to the "Save?"
prompt.

This fixes https://savannah.gnu.org/bugs/?52474.

While doing that, move the affected function to the utils.c file
and tweak it a bit.

This fixes https://savannah.gnu.org/bugs/?52468.

Since file-5.10 (end of 2011), libmagic identifies a C file in most
cases as "C source" instead of as "C program".  Nano's magic strings
for some other files didn't match any more what file-5.32 currently
produces, either.  So, they have been adjusted, new ones added, and
old ones deleted.

This fixes https://savannah.gnu.org/bugs/?52445.

This fixes https://savannah.gnu.org/bugs/?52392.

Adding the obscure A_PROTECT attribute to every color prevents an
occasional miscoloring of the first few rows on the screen -- when
ncurses is version 6.0 and dates from before October 17, 2015.
Original-idea-by: Brand Huntsman <alpha@qzx.com>
Tested-by: Brand Huntsman <alpha@qzx.com>

This fixes https://savannah.gnu.org/bugs/?52182.

When there are no help lines, there won't be any call to update the
actual contents of the bottom window, so... do it immediately after
blanking the row.

This fixes https://savannah.gnu.org/bugs/?52377.

Also, remove an unneeded pair of braces.

Signed-off-by: Marco Diego Aurélio Mesquita <marcodiegomesquita@gmail.com>

One should test a change before pushing, also when it worked last time.

Whenever a buffer is closed, check whether the positions file on disk
was modified, and if so, reload it.  Then update the position for the
closed buffer and write out the positions file to disk.
Signed-off-by: Brand Huntsman <alpha@qzx.com>
Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>

The function get_key_buffer() assumes waiting_mode = TRUE, but stdin
can be in non-blocking mode when a program (before nano) turned stdin
to non-blocking mode and did not change it back (possibly because it
crashed).  So, explicitly set stdin to blocking mode at startup.
Signed-off-by: Lion Yang <lion@aosc.io>

Also, diversify them, and no longer mark them for translation.

Also, properly refer to numreplaced as signed, since it's ssize_t
(even though it's only shown when positive).

This fixes https://savannah.gnu.org/bugs/?52339.

When not finding a .nanorc file in the user's home directory, nano will
look for a nanorc file in $XDG_CONFIG_HOME and in the ~/.config/nano/
fallback directory.  And when not finding a .nano/ subdir in the user's
home directory, nano will look for (or create) the history files in
$XDG_DATA_HOME or in the ~/.local/share/nano/ fallback directory.

This is a partial implementation of the XDG Base Directory Specification:
https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html

,
for the purpose of reducing the clutter in a user's home directory, and
to make it easier to back up just the configuration files.
Signed-off-by: Simon Ochsenreither <simon@ochsenreither.de>
Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>

Suggested-by: Brand Huntsman <alpha@qzx.com>

If the user uses a single version of nano, they have no need for
--quiet.  If they do sometimes use an older version and don't want
to see the warnings, they can use 2>/dev/null (they could make an
alias for that and put it before the call of nano).

The user told nano to start, thus nano should *start* -- without
halting and without nagging the user.